Need help diagnose PS Vita 2004

[u/fuyuki84]

https://youtu.be/18leE3e0flM

Hello! I found my little brother's PSVita, I fully charged the battery (solid orange shutting down after hours) When I press the power button, the orange light shut down, blink one time and become solid orange again. Nothing more.. I tried, ps button + r + power for 30 seconds Ps button + select + start + power for 30 seconds Just power button for one minute...

Someone can help me please?